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8322648: Improve class initialization barrier in TemplateTable::_new for PPC

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Reviewed-by: mdoerr
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Varada M 2024-01-31 06:12:35 +00:00 committed by Martin Doerr
parent 577de17d24
commit f7121de4a0
1 changed files with 7 additions and 8 deletions
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15
src/hotspot/cpu/ppc/templateTable_ppc_64.cpp
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@ -1,6 +1,6 @@
/*
* Copyright (c) 2014, 2023, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2013, 2023 SAP SE. All rights reserved.
* Copyright (c) 2014, 2024, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2013, 2024 SAP SE. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
@ -3803,16 +3803,15 @@ void TemplateTable::_new() {
__ sldi(Roffset, Rindex, LogBytesPerWord);
__ load_resolved_klass_at_offset(Rcpool, Roffset, RinstanceKlass);
// Make sure klass is fully initialized and get instance_size.
__ lbz(Rscratch, in_bytes(InstanceKlass::init_state_offset()), RinstanceKlass);
// Make sure klass is initialized.
assert(VM_Version::supports_fast_class_init_checks(), "Optimization requires support for fast class initialization checks");
__ clinit_barrier(RinstanceKlass, R16_thread, nullptr /*L_fast_path*/, &Lslow_case);
__ lwz(Rinstance_size, in_bytes(Klass::layout_helper_offset()), RinstanceKlass);
__ cmpdi(CCR1, Rscratch, InstanceKlass::fully_initialized);
// Make sure klass does not have has_finalizer, or is abstract, or interface or java/lang/Class.
__ andi_(R0, Rinstance_size, Klass::_lh_instance_slow_path_bit); // slow path bit equals 0?
__ crnand(CCR0, Assembler::equal, CCR1, Assembler::equal); // slow path bit set or not fully initialized?
__ beq(CCR0, Lslow_case);
__ bne(CCR0, Lslow_case);
// --------------------------------------------------------------------------
// Fast case: